Tread portion of an automobile tire



FIG. 1 is a perspective view of a tread portion of an automobile tireshowing my design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a fragmentary enlarged front view surrounded by line A-A andB-B in FIG. 2;

FIG. 7 is a sectional view taken along line 7-7 in FIG. 6; and,

FIG. 8 is a sectional view taken along line 8-8 in FIG. 6.

The intermediate and dark stippled shading in FIGS. 1-6 represent treadgrooves having the depth shown in FIGS. 7 and 8.

CLAIM The ornamental design for a tread portion of an automobile tire,as shown and described.